Testing-machine



(No Model.)

R. BAGALEY.

TESTING MACHINE.

Patented Oct. 2, 1888 FIBJ.

INVENTOR,

WITNESSES:

ffiixm N. PEIERs Phomurho ra mr, Wmhingmn, 0.6.

UNITED STATES arena rarest RALPH BAGALEY, OF PITTSBURG, PENNSYLVANIA.

TESTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 390,550, dated October2, 1888. Application filed Juno 6, 1888. Serial No. 276,234. (No model.)

To all whom it may concern.-

Be it known that I, RALPH BAGALEY, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented or discovered a certain new and usefulImprovement in Testing-Machines, of which improvement the following is aspecification.

In Letters Patent No. 385,833, July 10, 1888, I have described fordetermining the balance, or, rather, the lack of balance, of rotatingbodies, said apparatus consisting, essentially, of a shaft carrying thebody whose balance is to be adjusted, said shaft being mounted inyielding bearings. In said apparatus a marker is employed for marking onthe rotating body the point of excessive or overbalancing weight; butwhile determining the location of excessive weight with sufficientaccuracy such device cannot furnish any data whereby the amount orweight of material to be removed from the r0- tating body can bedetermined.

The object of the invention described herein is to provide for thedetermination with practical accuracy not only of the location ofexcessive weight at one point in a rotating body, but also the amount tobe removed from said point or added to a diametrically-opposite point inorder that the body may rotate truly.

In general terms, the invention consists in the construction andcombination of mechanical devices or elements, all as more fullyhercinafter described and claimed.

In the accompanying drawings, forming a part of this specification,Figure 1 is a sectional elevation of balancing-machine having myimproved indicator applied thereto, and Fig. 2 is an end view of saidmachine.

The balancing-machine proper is preferably constructed similar to thatdescribed in the application hcreinbefore referred to, and consists ofhousings 1, secured to or formed on the base 2. In the openings orwindows of the housings are arranged a series of springs, 3, preferablyfour in number, having their outer ends resting in sockets/t, formed inthe heads of screws 5, passing through threaded holes in the housings,and their inner ends bearing against journal-boxes G, which are providedwith suitable sockets or recesses for the recepgranted to me anapparatus tion of the ends of the springs. These springs serve to holdthe journal-boxes in a state of equilibrium, or free to move in anydirection under any actuating force.

In the journal-boxes 6 is mounted a shaft, 7, carrying the body to betested as, for example, a carwheel, as shown in Fig. 1. As fullydescribed in the application hereinbefore referred to, a preponderanceof weight on any part of the wheel will, by its centrifugal action whenthe wheel is rotated, tend to carry the wheel and its shaft around aline passing through the axis of the shaft when normal or at rest, andthat part of the wheel having the preponderating weight will describe acircle of greater radii than any other part of the wheel, and hence if apiece of chalk or other marking device be held within the circledescribed by the wheel only that part of the wheel having thepreponderating weight would come into contact with the marker. Thismanner of marking is effective in determining the location of thepreponderating weight, but affords no data whereby the weight orquantity of metal to be removed or added to the wheel or other rotatingbody may be determined. In order to obtain such data, I place a disk, 8,on the shaft, and upon a suitable stationary support, 9, withinproximity of the disk, is located a pointer or index, 10. As this diskwill partake of the movements of the shaft and wheel or other rotatingbody mounted on said shaft, it follows that if the pointer be broughtinto contact with the face of the disk while it will inscribe a circlethereon whose center will be outside of the center of the disk, theamount of such eccentric ity will be proportional to the excess ofweight at one part of the wheel or rotating body, and that point of theinscribed circle which approaches nearest to the center of the disk willbe in the plane passing through the axis of the wheel and the pointofprep0nderating weight on the wheel or rotating body. If now a number ofcircular lines having their centers coinciding with the center of thedisks be formed on the face of the disk with which the pointer comesinto contact, and the distance of said lines from a starting-point beproportioned to the distances which certain prepondcrating weights- 0.one, two, three,

3 see or more ounces or pounds-will, under centrifugal action producedby a certain number of revolutions, cause the axis of the shaft todiverge from a line coinciding with said axis when the shaft is at restor in normal position, not only can the location, but also the amount,of the prepondcrating weight be ascertained by observing the line towhich index points while the wheel is rotating.

The index or pointer should be arranged in the same horizontal plane asthe axis of the shaft when at rest, or normal. If desired, a markeroperative on the wheel may be employed in connection with the indicatingdevice herein described.

WVhere the prcponderating weight is located to one side of a plane atright angles to the axis biseeting the wheel equally, the end of theshaft on the same side of the bisccting plane as the preponderatingweight will have a greater amplitude of motion than the opposite end ofthe shaft, or even of the wheel it self, and hence the indicating-diskon such end of the shaft will afford abetter indication than when themarker is applied to the wheel.

The principal characteristic of my invention is the employment of agraduated disk to which is imparted movements of a character said shaftfree to move in one or more directions, an indicating device movablewith the wheel or body to be tested, and a fixed reference-point,substantially as set forth.

2. In an apparatus for balancing wheels and other bodies capable ofbeing rotated, the combination of a shaft carrying the wheel or body tobe balanced, one or more bearings for said shaft having yielding supportor supports, one or more graduated disks movable with the wheel or otherbody, and a fixed reference-point or index, substantially as set forth.

In testimony whereof I have hereunto set my hand.

RALPH BAGALTJY.

\Vitnesses:

DARWIN S. WoLco'r'r, R. H. WHIT'rLEsEY.

